Asphalt mixture with superstrong anti-rutting performance

Abstract

The invention relates to an asphalt mixture with superstrong anti-rutting performance, and particularly relates to an asphalt mixture which has especially excellent anti-rutting performance at a high temperature, and is especially applicable to the field of heavy-duty traffic. The asphalt mixture comprises aggregate, cement, modified asphalt and an anti-rutting agent, and the aggregate comprises crude aggregate and fine aggregate; and the specifications of the aggregate are respectively 19-26.5mm, 11-19mm, 5-11mm, 3-5mm and 0-3mm, and the ratios of the aggregates and the cement accounting for total mass of the aggregates and cement is 12:33:25:10:18:2. The preparation method of the asphalt mixture comprises the following steps: 1) preparing modified asphalt; 2) mixing the aggregates with cement, and adding the anti-rutting agent; and 3) weighing the modified asphalt obtained in the step 1), which accounts for 4.38% of the mass of the aggregates and the cement, and placing into a mixing cylinder and stirring for 40-45s, to obtain the asphalt mixture with superstrong anti-rutting performance. The water stability and low-temperature performance can meet the requirement of an expressway, and the high-temperature stability performance is especially excellent.

Description

technical field [0001] The invention relates to an asphalt mixture with super-strong anti-rutting performance, which relates to an asphalt mixture with particularly excellent high-temperature anti-rutting deformation ability, and is very suitable for the field of heavy-duty traffic. Background technique [0002] The N5 and N55 highway projects of the main national highways aided to Pakistan are both important economic belts of Pakistan, and they are the transportation arteries for the rapid development of Pakistan to transport materials, without a waterway transportation system. With the rapid growth of the vehicle transportation industry, the phenomenon of overloading is particularly serious, and the traffic pressure of the project has increased sharply. Moreover, the project site is located in the red peak area of ​​Pakistan, where the annual extreme temperature is as high as 48°C, and the road surface temperature has exceeded 70°C. The on-site rutting disease about 20cm d...

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Problems solved by technology

Moreover, the project site is located in the temperature red peak area of ​​Pakistan. The annual extreme temperature is as high as 48°C, and the road surface temperature has exceeded 70°C. The on-site rutting disease about 20cm deep has seriously affected people's travel safety.

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